/**
*  Copyright (c) 2011, Alex Theodoridis
*  All rights reserved.

*  Redistribution and use in source and binary forms, with 
*  or without modification, are permitted provided that the 
*  following conditions are met:
*  Redistributions of source code must retain the above 
*  copyright notice, this list of conditions and the following disclaimer.
*  Redistributions in binary form must reproduce the above 
*  copyright notice, this list of conditions and the following
*  disclaimer in the documentation and/or other materials 
*  provided with the distribution.

*  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
*  AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
*  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
*  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
*  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
*  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
*  OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
*  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
*  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
*  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
*  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
*  ANY WAY OUT OF THE USE OF THIS SOFTWARE,
*  EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
*/

#ifdef linux
#include <Utilities/AutoLock/LLockObject.h>
#include <errno.h>

namespace utils {

    LLockObject::LLockObject() {
        _errorCode = pthread_mutex_init(&_mutex, NULL);
    }

    bool LLockObject::lock(unsigned int waitTime) const {
        if (_errorCode != 0) {
            return false;
        }

        pthread_mutex_t mutex = _mutex;
        if (pthread_mutex_lock(&mutex) != 0) {
            return false;
        }

        return true;
    }

    bool LLockObject::unlock(void) const {
        pthread_mutex_t mutex = _mutex;
        if (_errorCode != 0) {
            return false;
        }

        int result = pthread_mutex_unlock(&mutex);
        if (result == EINVAL || result == EFAULT || result == EPERM) {
            return false;
        }

        return true;
    }

    LLockObject::~LLockObject() throw () {
        if (_errorCode != 0) {
            pthread_mutex_destroy(&_mutex);
        }
    }

}
#endif
